20542600

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{7901}}^1$

素因数の和:7930

約数の個数: 48

約数和(自身を含む): 51442020

約数和(自身を除く): 30899420

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 325, 520, 650, 1300, 2600, 7901, 15802, 31604, 39505, 63208, 79010, 102713, 158020, 197525, 205426, 316040, 395050, 410852, 513565, 790100, 821704, 1027130, 1580200, 2054260, 2567825, 4108520, 5135650, 10271300, 20542600]

約数ペア:

[(1, 20542600), (2, 10271300), (4, 5135650), (5, 4108520), (8, 2567825), (10, 2054260), (13, 1580200), (20, 1027130), (25, 821704), (26, 790100), (40, 513565), (50, 410852), (52, 395050), (65, 316040), (100, 205426), (104, 197525), (130, 158020), (200, 102713), (260, 79010), (325, 63208), (520, 39505), (650, 31604), (1300, 15802), (2600, 7901)]